Nickname SVN e nomi Git sono unificati per persona.
In gloadtile_art, (1) get the current texel's index, (2) apply alpha if index == 255, (3) get the index by indexing into the specified palookup table, and then (4) apply fullbright considerations. Previously these tasks were performed in order 1432.
Add a new pthtyp flag to mark textures that should not be processed by the fixtransparency() hack (which avoids the transparent color blending into a sprite when texture filtering is enabled), such as non-(T)ROR-masking floors and ceilings, white- and mask-walls, paper-skies, and rotatesprite with orientation flag 64. This commit makes sure the flag's status always fits the situation.
This fixes the remaining issue with WWII GI's LOGO.ANM: Color index #255 is used as the dominant white color (not as a transparent index) and fixtransparency() was mangling the image as a result.
Don't test (!usemodels || md_tilehasmodel(picnum, pal) < 0) in eligible_for_tileshades (called only from getshadefactor) because getshadefactor is only called when a model is *not* being drawn, and therefore results in incorrect shading when drawing a tile with a model defined and models enabled to the screen or as a skybox.
Slight optimizations in getshadefactor.
